What is RVSM
Reduced Vertical Separation Minimum (RVSM) was introduced to reduce the
vertical separation above flight level (FL) 290 from the traditional 2000-ft
minimum to 1000-ft minimum. This allows aircraft to fly more fuel optimum
profiles, increases airspace capacity and reduces in-flight delays by providing
six additional cruising levels between FL290 and FL410.
Worldwide RVSM Implementation
Operation within RVSM Airspace
All aircraft operators intending to fly within RVSM applied Flight Levels
(FLs) are required to be registered with the JASMA. All aircraft are required
to be certified for RVSM airworthiness by the State aviation authority
where the operator is registered. The operators who operate in RVSM applied
airspace are required to participate in the ongoing monitoring program.
The JASMA has responsibility for the provision of monitoring and safety
assessment activities in Fukuoka FIR, and maintain an database of RVSM
Approval Process for RVSM Operation
The RVSM approval process for aircraft operators registered in Japan is
- Register point of contact to JASMA using Form F1
- Complete RVSM aircraft engineering requirements for RVSM airworthiness
approval evaluated by the JCAB
- Receive RVSM airworthiness approval from State CAA.
- Upon receiving airworthiness approval, the aircraft is qualified for height
keeping performance monitoring.
- Complete RVSM operations and maintenance requirements for RVSM operational
approval evaluated by State CAA
- Receive RVSM operation approval from State CAA and report the operation
approval to JASMA using Form F2
Note: Operators are requested to ensure that the required numbers of aircraft
are monitored to comply with the ongoing periodical monitoring requirement.
(See Height Monitoring, MMR)
Operation of non-RVSM Approved Aircraft
ACCs providing ATC service within RVSM airspace may clear non-RVSM approved
aircraft to climb or descend through RVSM airspace. Such climbs or descents
shall be achieved before the aircraft passes the transfer of control point
to the adjacent ACC, if applicable, unless otherwise specified in an inter-ACC
letter of agreement.
Report of Large Height Deviation(LHD)
RASMAG has adopted the following plain language definition of a large height deviation for RVSM operations;
An RVSM Large Height Deviation (LHD) is defined as any vertical deviation of 90 metres/300 feet or more from the flight level expected to be occupied by the flight.
All LHDs must be reported to the JASMA; this includes those due to TCAS,
turbulence and contingency events.